/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/***********************************************************************
*   $Id: messagequeue.cpp 3632 2013-03-13 18:08:46Z pleblanc $
*
*
***********************************************************************/
#include <string>
#include <stdexcept>
#include <sstream>
#include <cstring>
using namespace std;

#include <unistd.h>
#include <sys/types.h>
#ifdef _MSC_VER
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif

#include "configcpp.h"
using namespace config;

#include "bytestream.h"
#include "inetstreamsocket.h"
#ifndef SKIP_IDB_COMPRESSION
#include "compressed_iss.h"
#endif
#include "socketclosed.h"

#define MESSAGEQUEUE_DLLEXPORT
#include "messagequeue.h"
#undef MESSAGEQUEUE_DLLEXPORT

namespace messageqcpp
{

void MessageQueueServer::setup(size_t blocksize, int backlog, bool syncProto)
{
    string thisEndPortStr;

    thisEndPortStr = fConfig->getConfig(fThisEnd, "Port");
    uint16_t port;

    if (thisEndPortStr.length() == 0 || (port = static_cast<uint16_t>(strtol(thisEndPortStr.c_str(), 0, 0))) == 0)
    {
        string msg = "MessageQueueServer::MessageQueueServer: config error: Invalid/Missing Port "
                     "attribute for " + fThisEnd;
        throw runtime_error(msg);
    }

    in_addr listenAddr;
    listenAddr.s_addr = INADDR_ANY;
    string listenAddrStr = fConfig->getConfig(fThisEnd, "ListenAddr");

    if (listenAddrStr.length() > 0)
    {
        struct in_addr la;

        if (inet_aton(listenAddrStr.c_str(), &la) != 0)
            listenAddr = la;
    }

    memset(&fServ_addr, 0, sizeof(fServ_addr));
    sockaddr_in* sinp = reinterpret_cast<sockaddr_in*>(&fServ_addr);
    sinp->sin_family = AF_INET;
    sinp->sin_addr.s_addr = listenAddr.s_addr;
    sinp->sin_port = htons(port);

#ifdef SKIP_IDB_COMPRESSION
    fListenSock.setSocketImpl(new InetStreamSocket(blocksize));
#else
    fListenSock.setSocketImpl(new CompressedInetStreamSocket());
#endif
    fListenSock.syncProto(syncProto);
    fListenSock.open();
    fListenSock.bind(&fServ_addr);
    fListenSock.listen(backlog);

#ifdef SKIP_IDB_COMPRESSION
    fClientSock.setSocketImpl(new InetStreamSocket(blocksize));
#else
    fClientSock.setSocketImpl(new CompressedInetStreamSocket());
#endif
    fClientSock.syncProto(syncProto);
}

MessageQueueServer::MessageQueueServer(const string& thisEnd, const string& config,
                                       size_t blocksize, int backlog, bool syncProto) :
    fThisEnd(thisEnd),
    fConfig(Config::makeConfig(config)),
    fLogger(31)
{
    setup(blocksize, backlog, syncProto);
}

MessageQueueServer::MessageQueueServer(const string& thisEnd, Config* config,
                                       size_t blocksize, int backlog, bool syncProto) :
    fThisEnd(thisEnd),
    fConfig(config),
    fLogger(31)
{
    if (fConfig == 0)
        fConfig = Config::makeConfig();

    setup(blocksize, backlog, syncProto);
}

MessageQueueServer::~MessageQueueServer()
{
    fClientSock.close();
    fListenSock.close();
}

const IOSocket MessageQueueServer::accept(const struct timespec* timeout) const
{
    return fListenSock.accept(timeout);
}

void MessageQueueServer::syncProto(bool use)
{
    fListenSock.syncProto(use);
    fClientSock.syncProto(use);
}

MessageQueueClient::~MessageQueueClient()
{
    fClientSock.close();
}

void MessageQueueClient::shutdown()
{
    fClientSock.close();
}

void MessageQueueClient::setup(bool syncProto)
{
    string otherEndIPStr;
    string otherEndPortStr;
    struct addrinfo hints, *servinfo;
    int rc = 0;

    otherEndIPStr = fConfig->getConfig(fOtherEnd, "IPAddr");
    otherEndPortStr = fConfig->getConfig(fOtherEnd, "Port");

    if (otherEndIPStr.length() == 0) otherEndIPStr = "127.0.0.1";

    if (otherEndPortStr.length() == 0 || static_cast<uint16_t>(strtol(otherEndPortStr.c_str(), 0, 0)) == 0)
    {
        string msg = "MessageQueueClient::setup(): config error: Invalid/Missing Port attribute";
        throw runtime_error(msg);
    }

    memset(&hints, 0, sizeof hints);
    // ATM We support IPv4 only.
    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;


    if( !(rc = getaddrinfo(otherEndIPStr.c_str(), otherEndPortStr.c_str(), &hints, &servinfo)) )
    {
        memset(&fServ_addr, 0, sizeof(fServ_addr));
        sockaddr_in* sinp = reinterpret_cast<sockaddr_in*>(&fServ_addr);
        *sinp = *reinterpret_cast<sockaddr_in*>(servinfo->ai_addr);
        freeaddrinfo(servinfo);
    }
    else
    {
        string msg = "MessageQueueClient::setup(): ";
        msg.append(gai_strerror(rc));
        logging::Message::Args args;
        logging::LoggingID li(31);
        args.add(msg);
        fLogger.logMessage(logging::LOG_TYPE_ERROR, logging::M0000, args, li);
    }

#ifdef SKIP_IDB_COMPRESSION
    fClientSock.setSocketImpl(new InetStreamSocket());
#else
    fClientSock.setSocketImpl(new CompressedInetStreamSocket());
#endif
    fClientSock.syncProto(syncProto);
    fClientSock.sa(&fServ_addr);
}

MessageQueueClient::MessageQueueClient(const string& otherEnd, const string& config, bool syncProto) :
    fOtherEnd(otherEnd), fConfig(Config::makeConfig(config)), fLogger(31), fIsAvailable(true)
{
    setup(syncProto);
}

MessageQueueClient::MessageQueueClient(const string& otherEnd, Config* config, bool syncProto) :
    fOtherEnd(otherEnd), fConfig(config), fLogger(31), fIsAvailable(true)
{
    if (fConfig == 0)
        fConfig = Config::makeConfig();

    setup(syncProto);
}

MessageQueueClient::MessageQueueClient(const string& dnOrIp, uint16_t port, bool syncProto) :
    fLogger(31), fIsAvailable(true)
{
    struct addrinfo hints, *servinfo;
    int rc = 0;

    memset(&hints, 0, sizeof hints);
    // ATM We support IPv4 only.
    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;

    if( !(rc = getaddrinfo(dnOrIp.c_str(), NULL, &hints, &servinfo)) )
    {
        memset(&fServ_addr, 0, sizeof(fServ_addr));
        sockaddr_in* sinp = reinterpret_cast<sockaddr_in*>(&fServ_addr);
        *sinp = *reinterpret_cast<sockaddr_in*>(servinfo->ai_addr);
        sinp->sin_port = htons(port);
        freeaddrinfo(servinfo);
    }
    else
    {
        string msg = "MessageQueueClient::MessageQueueClient(): ";
        msg.append(gai_strerror(rc));
        logging::Message::Args args;
        logging::LoggingID li(31);
        args.add(msg);
        fLogger.logMessage(logging::LOG_TYPE_ERROR, logging::M0000, args, li);        
    }
#ifdef SKIP_IDB_COMPRESSION
    fClientSock.setSocketImpl(new InetStreamSocket());
#else
    fClientSock.setSocketImpl(new CompressedInetStreamSocket());
#endif
    fClientSock.syncProto(syncProto);
    fClientSock.sa(&fServ_addr);
}

const SBS MessageQueueClient::read(const struct timespec* timeout, bool* isTimeOut, Stats* stats) const
{
    if (!fClientSock.isOpen())
    {
        fClientSock.open();

        try
        {
            fClientSock.connect(&fServ_addr);
        }
        catch (...)
        {
            fClientSock.close();
            throw;
        }
    }

    SBS res;

    try
    {
        res = fClientSock.read(timeout, isTimeOut, stats);
    }
    catch (runtime_error& re)
    {
        // This is an I/O error from IOSocket::read()
//		cerr << "MessageQueueClient::read: close socket for " << re.what() << endl;
        logging::Message::Args args;
        logging::LoggingID li(31);
        args.add("Client read close socket for");
        args.add(re.what());
        fLogger.logMessage(logging::LOG_TYPE_WARNING, logging::M0000, args, li);
        fClientSock.close();
        throw;
    }
    catch (SocketClosed& e)
    {
//		cerr << "MessageQueueClient::read: close socket for " << e.what() << endl;
        logging::Message::Args args;
        logging::LoggingID li(31);
        args.add("Client read close socket for");
        args.add(e.what());
        fLogger.logMessage(logging::LOG_TYPE_WARNING, logging::M0000, args, li);
        fClientSock.close();
        throw;
    }

    return res;
}

void MessageQueueClient::write(const ByteStream& msg, const struct timespec* timeout, Stats* stats) const
{
    if (!fClientSock.isOpen())
    {
        fClientSock.open();

        try
        {
            fClientSock.connectionTimeout(timeout);
            fClientSock.connect(&fServ_addr);
        }
        catch (...)
        {
            fClientSock.close();
            throw;
        }
    }

    try
    {
        fClientSock.write(msg, stats);
    }
    catch (runtime_error& e)
    {
        try
        {
            ostringstream oss;
            oss << "MessageQueueClient::write: error writing " << msg.length() << " bytes to "
                << fClientSock << ". Socket error was " << e.what() << endl;
//			cerr << oss.str() << endl;
            logging::Message::Args args;
            logging::LoggingID li(31);
            args.add(oss.str());
            fLogger.logMessage(logging::LOG_TYPE_WARNING, logging::M0000, args, li);
        }
        catch (...)
        {
        }

        fClientSock.close();
        throw;
    }
}

bool MessageQueueClient::connect() const
{
    if (!fClientSock.isOpen())
    {
        fClientSock.open();

        try
        {
            fClientSock.connect(&fServ_addr);
        }
        catch (runtime_error& re)
        {
            string what = re.what();

            if (what.find("Connection refused") != string::npos)
            {
                try
                {
                    fClientSock.close();
                }
                catch (...)
                {
                }
            }
            else
                throw;
        }
        catch (...)
        {
            throw;
        }
    }

    return fClientSock.isOpen();
}

}//namespace messageqcpp
